One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6)(7,8)(9,10,14,16)(11,12,15,13)(17,18,22,20)(19,21,24,23)(26,29)(27,31)(2,6)(4,7)(9,11,14,15)(10,12,16,13)(26,29)(30,32)(2,6)(3,8)(9,12,14,13)(10,11,16,15)(17,19,22,24)(18,23,20,21)(25,26)(27,30)(28,29)(31,32)(1,3,5,8)(2,7,6,4)(9,13,14,12)(10,15,16,11)(17,20,22,18)(19,21,24,23)(1,4,5,7)(2,8,6,3)(9,10)(11,12)(13,15)(14,16)(17,21)(18,19)(20,24)(22,23)(25,27)(26,30)(28,31)(29,32)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.